Tobacco pipe



April 25, 1933. J. M JENKlNS TOBACCO PIPE Filed 001'.. l5, 1950 ATTORNEYS Patented Apr. 25, 1933 salirse stares riesen:

JESSE M. JENKINS, or'y SUMMIT, NEWJERSEY 'roimcco rrrn Application led October 15, 1930. Serial No. 488,749.

This invention relates to an improvement' in tobacco pipes of the usual upright-bowl, down-draft type. f

The purposes of this invention are to provide a longer passage for the smoke, to cool the smoke, to provide metallic surfaces upon which the moisture content ofthe smoke will be condensed out, to facilitate the removal of the condensate and other liquid from the smoke passages and to provide for ease of cleaning the several parts.

A further object of the invention is to provide means whereby they smoke may be drawn from the bowl at a point above the l bottom of the bowl and further means whereby liquid accumulating in the passages of the pipe may be forced back to'the bottom of the bowl and absorbed in they tobacco therein contained, which tobacco. is below the point at which the smoke is withdrawn. l

This specification together with the drawing describes an embodiment of my invention. In the drawing Fig. 1 shows, in longitudinal cross section, a pipe of conventional design embodying my invention; Fig. 2 shows in vertical section a portion of a pipe and the insert which is the particular im- Y provenient described herein; Figs. 3, 4 and 5 are detailed views of the component parts of the insert shown in Fig. 2; and Fig. 6 is a view of the part shown in F ig. 5 taken at right angles to the latter.

I shall first describe a methodof construction which I have found desirable and then describe the operation of the pipe embodying my improvements.

Referring to Fig. 1, I have shown a pipe having a stem 1 of rubber, amber, bakelite or similar substance, a bowl 2 of briar root or similar material, into which the stem is fitted, and a stem bore 4 leading from the mouth piece 5 to the bowl 2. ,In the bowl wall 6, is a hole of a size which will receive the insert hereinafter described and shown in detail in Fig. V2.

The component parts ofthe insert shown in Fig. 2 are an outer shell 9, shown in Fig.

3; anA inner tube .10, shown inV Fig. 4; and 50 a base plug 12, of which two views are shown in Figs. 5 and 6. The parts of the insert are all made of a suitable metal, lpreferably one highly conductiveof heat. The

outer. shell 9 is closed at its top and open 55`l at its bottom. It is internally threaded at its lower end tovt external threads on the upper end of the base plug 12. y There is an aperature 13 near its lower end, so placed as not to be closed by the base plug 12 when 6u the outer shell and base plug are screwed together.

The inner tube 10, Fig. 4, is carried'by the base plug 12 into which it is tightly fitted. The inner tube 10 is of such length 65 that when seated in the base plug 12 and whenthe base'plug 12 and the outer shell 9 are screwed together the top of the tube 10 does not reach the top of the shell 9. The 4outer diameter of the tube 10 is slight- 70 ly less thanthe inner diameter of the shell 9 so'that there is a space between the tube and the shell. y

The inner tube 10 is open at its top and has in its lower end a relatively small opening 15, the purpose of which will be describedwhen explaining the` function of my invention. The inner tube is formed with a slight shoulder 16 which rests upon the base'plug 12. There is anopening 17 in 80 the side wall of the tube 1.0:approximately at or near the bottom of the tube so that there is lformed above the aperture '15 a shallow sump or pocket 18. l Thebase plug 12 is formed in Figs. 5 and 6. Its bottom is in the form of a screw head having a slit Aadapted for unscrewing the plug with a coin. It has a Vshoulder 7, which bears against a .seat 8 in the bowl, forming a water-tight Joint. The 90 as illustrated l y bottom may be made to conform to the bottom of the bowl of the pipe of which it is a part. The body of the'base plug 12 is tubular, threaded at its upper end and having an internal diameter corresponding to the external diameter of the lower end of the inner tube 10. In the sides of the base plug 12 there are two openings. The upper opening 19 coincides with the opening in the inner tube 10 as shown in Fig. 2. The lower opening 20 is in the nature of an under-cut which forms a chambery below the end of the tube 10 which is in communication with the bowl 2 of the pipe through a ,channel 22 (Fig. 1) which is ,cut inVV the bottom of the pipe. If desired, the' tube 10 and the base-plug 12 may be combinedV andV may be manufactured from a single piece of metal. Y

It will be noted with respect to the openings just described that the registering openings 17 and 19 are positioned to communicate with the bore 4 through thestem of the pipe, the opening 13 in the shell9 communicates with the bowl 2 slightly above the bottom of the bowl, and the chamber 20 communicates with the bottom of the bowl 2 through the channel 22. Y

The hole drilled in the bottom of the bowl wall 6 is of such size that when the shell 9 is forced into it it will be firmly held by friction. The outside diameter vof the wall of the base plug 12 is slightly less than the outside diameter of the shell 9 so that the base plug 12 and the tube 1() carried thereby may be unscrewed from the shell 9 and removed from the pipe while the shell 9 recates directly with the bowl 2.

mains therein. The hole drilled in the bottom of the bowl wall 6 is so placed that one side of the shell 9 protrudes into the bowl, as shown in Figs. l and 2, which exposes the wall having the opening 13 which communi- Having described the component parts of this embodiment of my invention and the method of their assembly, I shall now explain how the results to which the invention is directed are obtained. Tobacco is placed in the bowl 2, and lighted at the top anda suction is produced through the stem bore 4 by the act of smoking. The smoke descending through the tobacco in the bowl 2, under the influence of suction, enters the opening 13, passes up between the shell 9 and the tube 10, down through the tube 10, and into the stem bore 4 through the openings 17 and 19, as indicated by arrows in Fig. 2. In passing between these metallic walls, which are cooled by the radiation of their heat through the exposedsurface of the base plug 12, and through the wall of the bowl, some of the vapors contained in the smoke are condensed and the resulting condensate falls to the bottom of the tube 10 and collects in the sump 18 provided the stem of the pipe.

therein. The opening 15 is of such a small size that most of the liquid will not go through it under the influence of gravity alone because of the surface tension and capillary phenomena of the liquid. Whatever moisture condenses between the shell 9 and the tube 10 will either be drawn up into the tube 10 by the flow of air through the narrow space betweenV the walls of the said shell and tube or will run out through the opening 13. Any condensate or other liquid which runs along the stem bore 4 will likewise drop into the sump 18. When the sump 18 becomes filled, the smoker detects this factrby the sound caused by the liquid "in theair passage. My invention enables the smoker then to clear the air passages of liquid by merely blowing into When he does this, air pressure is built up in the tube 10 and the shell 9 and the liquid in the sump 18 together with liquid blown'down the stem is forced through the opening 15 into the chamber 20. v

With this operation in mind, it is apparent that the optimum size of the opening 15 will be such that under the ordinary draft produced in smoking practically no smoke is drawn through the opening 15, yet under the pressure produced by blowing into the stem 4, the liquid will readily flow through the opening.

This scavenging operation may be repeated many times without the accumulation of more liquid than the pipe will accommodate as the liquid is blown up into the tobacco in the bottom of the bowl, after it reaches a certain quantity, and is absorbed in the tobacco below the point at which the smoke is drawn off through the opening 13. When the pipe is emptied this wet tobacco is eliminated carrying with it the surplus fluid. l It is obvious that various modificationsl may be made in this embodiment without departing from the spirit of the invention. I

have described an embodiment which I have found to give satisfactory results.

IV claim:

1. In a tobacco pipe, the combination of a bowl, a stem having a. bore leading to the bowl, a vertical tubular shell and a tube therein located between the bowl and the bore of said stem and connected respectively thereto by openings in the walls of said tube and said shell, whereby the smoke is forced to travel substantially the length of both the shell andthe tube in passing from the bowl to the bore of the stem, the said tube having a small oriiice at its lower end and a base member having a chamber below said orifice,

and the said bore, said insert Vcomprising on outer shell and an inner tube, the shell being connected to the bowl and the tube to the stem bore, the inner tube having a minp ute opening at its lower end, a base member having a chamber below said opening, said chamber communicating with said bowl.

3. In a tobacco pipe, the combination of a bowl, a stem having a bore leading to the bowl, a cylindrical shell mounted inthe wall of said bowl and closed at its top and open at its bottom, said shell having an'aperture communicating with said bowl, a tube open at its top arranged in said shell andspaced from the top and sides thereof, said tube having in its bottom a minute orifice and in its side near vits bottom an aperture communicating with the bore of said stem, and means Jfor positioning said tube in spaced relation to said shell.

4. In a pipe, the combination with a bowl and a stem having a bore, of two tubes, one within the other, a base plug carrying the inner tube and removably secured to the outer tube, said plug maintaining said inner tube in spaced relation to said outer tube, Jche side of the outer tube having an aper# ture communicating with said bowl, the inner tube having an aperture at its side near its bottom and the base plug having an aperture registering with the aperture in said inner tube and communicating with the bore of said stem, the bottom of said inn-er tube having a small aperture communicating with a chamber in said base plug below said aperture which communicates with said bowl.

5. In combination with a tobacco pipe having a bowl portion and a stem having a bore communicating with said bowl portion, said bowl portion being provided with a cylindrical cavity extending upwardly into the wall of said bowl portion adjacent the stem, an insert adapted to fit said cavity comprising an externally-threaded base plug having an open chamber therein, a tube carried thereby open at its top and having a small orice in its lower end communicating with said chamber, an outer shell closed at it s top and internally-threaded in its lower end for attachment to said plug, said shell a-nd said tube having an interjacent space at the top and sides, said shell having an opening in its wall above the point of attachment to said plug and communicating with the bowl, and said tube and said plug having registering openings a short distance above the bottom of said tube communicating with the stem bore.

6. In a tobacco pipe, the combination of a bowl, a stem having a bore throughout its length, a metallic insert interjacent the bowl In testimony whereof, I have signed this specication.

l JESSE JENKINS.

and the bowl end of said stem, a passage from said bowl to the bottom of said insert, said insert comprising an outer shell 1n com- 

